Fuel-resistant liquid asphalt binders and methods of making the same

Abstract

A fuel-resistant liquid asphalt binder including a composition of fatty amine derivatives for improving the flowability and workability of a bituminous asphalt mix. The fuel-resistant liquid asphalt binder may include 0.4 wt % to 0.7 wt % of a composition of fatty amine derivatives, 2 wt % to 5 wt % styrene-butadiene-styrene, and 2 wt % to 5 wt % high acetate content ethyl vinyl acetate. The fuel-resistant liquid asphalt binder may be mixed with an aggregate to form a bituminous asphalt mix at temperatures ranging from 330° F. to 280° F.

What is claimed is: 
     
       1. A fuel-resistant liquid asphalt binder comprising:
 a liquid asphalt binder base having a concentration in the range of 89.3 wt % to 95.6 wt %; 
 styrene-butadiene-styrene having a concentration in the range of 2 wt % to 5 wt %; 
 high acetate content ethylene vinyl acetate having a concentration in the range of 2 wt % to 5 wt %; and 
 a composition of fatty amine derivatives having a concentration in the range of 0.4 wt % to 0.7 wt %. 
 
     
     
       2. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the styrene-butadiene-styrene has a concentration in the range of 3 wt % to 4 wt %. 
     
     
       3. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the high acetate content ethylene vinyl acetate has a concentration in the range of 3 wt % to 4 wt %. 
     
     
       4. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the composition of fatty amine derivatives has a concentration in the range of 0.45 wt % to 0.55 wt %. 
     
     
       5. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the fuel-resistant liquid asphalt binder has an ASTMD7173 maximum temperature difference of less than or equal to 40° F. when using a ASTM D36 Ring and Ball apparatus. 
     
     
       6. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the fuel-resistant liquid asphalt binder has a minimum performance grade of PG 82-22. 
     
     
       7. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the fuel-resistant liquid asphalt binder has an ASTM D6084 elastic recovery at 25° C. of greater than or equal to 85%. 
     
     
       8. A bituminous asphalt mix comprising:
 a fuel-resistant liquid asphalt binder comprising:
 a liquid asphalt binder base having a concentration in the range of 89.3 wt % to 95.6 wt %; 
 styrene-butadiene-styrene having a concentration in the range of 2 wt % to 5 wt %; 
 high acetate content ethylene vinyl acetate having a concentration in the range of 2 wt % to 5 wt %; and 
 a composition of fatty amine derivatives having a concentration in the range of 0.4 wt % to 0.7 wt %, 
 
 air voids; and 
 an aggregate. 
 
     
     
       9. The bituminous asphalt mix of  claim 8 , wherein the fuel-resistant liquid asphalt binder has a concentration in the range of 4 wt % to 9 wt %. 
     
     
       10. The bituminous asphalt mix of  claim 8 , wherein the air voids have a concentration in the range of 2 vol % to 3 vol %. 
     
     
       11. The bituminous asphalt mix of  claim 8 , wherein the mix has a weight loss by fuel immersion of less than 2.5% when measured according to FAA P-601 test specifications. 
     
     
       12. A method of making a fuel-resistant liquid asphalt binder, the method comprising:
 mixing a liquid asphalt binder base and styrene-butadiene-styrene in a high shear mixer, thereby forming a first mixture; 
 adding at least one cross-linking agent to the first mixture; 
 curing the first mixture; 
 mixing the first mixture with high acetate content ethylene vinyl acetate in a high shear mixer; thereby forming a second mixture; and 
 mixing a composition of fatty amine derivatives with the second mixture, thereby forming the fuel-resistant liquid asphalt binder; 
 wherein the liquid asphalt binder base has a concentration in the range of 89.3 wt % to 95.6 wt % in the fuel-resistant liquid asphalt binder; the styrene-butadiene-styrene has a concentration in the range of 2 wt % to 5 wt % in the fuel-resistant liquid asphalt binder; the high acetate content ethylene vinyl acetate has a concentration in the range of 2 wt % to 5 wt % in the fuel-resistant liquid asphalt binder; and the composition of fatty amine derivatives has a concentration in the range of 0.4 wt % to 0.7 wt % in the fuel-resistant liquid asphalt binder. 
 
     
     
       13. The method of  claim 12 , wherein the styrene-butadiene-styrene has a concentration in the range of 3 wt % to 4 wt % in the fuel-resistant liquid asphalt binder. 
     
     
       14. The method of  claim 12 , wherein the high acetate content ethylene vinyl acetate has a concentration in the range of 3 wt % to 4 wt % in the fuel-resistant liquid asphalt binder. 
     
     
       15. The method of  claim 12 , wherein the composition of fatty amine derivatives has a concentration in the range of 0.45 wt % to 0.55 wt % in the fuel-resistant liquid asphalt binder. 
     
     
       16. The fuel-resistant liquid asphalt binder of  claim 1 , wherein the fuel-resistant liquid asphalt binder has an ASTMD7173 maximum temperature difference of less than or equal to 40° F. when using a ASTM D36 Ring and Ball apparatus,
 wherein the fuel-resistant liquid asphalt binder has a minimum performance grade of PG 82-22, and 
 wherein the fuel-resistant liquid asphalt binder has an ASTM D6084 elastic recovery at 25° C. of greater than or equal to 85%.